Documentation/Demo request: an example for the new media plugin usage

[bvlz]

The new media plugin by @complanar is missing a README.

It would also be very helpful to have a concise demo under examples.

[henrikingo]

The plugin has extensive documentation at the top of the js file. Several plugins do this and omit the README. That said, I'm not against moving that documentation to the README. I realize for example in github there's an advantage to doing that.

Adding a demo under examples is a good suggestion. For example, adding a slide into classic-slides would probably be sufficient.

[simplePCBuilding]

I would be willing to collect all the documentation and move it to the wiki.

[henrikingo]

Thank you @simplePCBuilding ! That would be amazing!

[simplePCBuilding]

I have collected all the documentation in #847 and also added the docs for all the other plugins that were still missing it.

[simplePCBuilding]

Done, can be closed